Fast equivalent model of isolated bidirectional DC-DC converters for DC microgrid study

In the simulation study of DC micro grid with a large number of isolated bidirectional DC-DC converters, both the calculation time cost and the harmonic performances need to be considered. However, traditional simple models do not have the harmonic performance, and complicated models do not have fast simulation speed. In this paper, a novel fast equivalent model of isolated bidirectional DC-DC converters for DC micro grid study is proposed. It has a simple structure and has the similar harmonic performances with the switching model. Furthermore, it is easy to be set up and can save much calculation time cost. Simulation results in Matlab/Simulink verify the feasibility and validity of the proposed model, and show superior performances.